Will give 20 points.

the dimensions of rectangle b are twice the dimensions of rectangle a. the area of rectangle a is 50 cm2. what is the area of rectangle b?

Step-by-step explanation:

To double the dimensions, you must multiply both the length and width by 2, so instead of just , you have , which can be simplified even further to

Now, multiply the 2s together to get 4, making the equation . Since is , and is 4 times as much as , you just need to multiply the original area by 4 to get the new area.